In order to watch 4K HDR content on a 4K HDR TV with a receiver in line between SHIELD and your TV, then your receiver must also support HDMI 2.0a and 4K HDR. Your receiver should report this capability in the product manual.
If I Connect My SHIELD to a Receiver, Does My Receiver Also Need to Support 4K HDR
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If I Connect My SHIELD to a Receiver, Does My Receiver Also Need to Support 4K HDR